Glass mosaic ribbed bowl fragment late 1st century B.C.-early 1st century A.D. Roman Body fragment, thin-walled.Translucent deep honey brown and opaque white.Convex curving side tapering downward to bottom.Ribbon mosaic pattern formed from sections of a single cane in brown ground with irregular wavy white threads in parallel lines; on exterior, three vertical shallow ribs, fairly widely spaced, with rounded outer edges and ending around bottom.Polished exterior; pitting of surface bubbles and small patches of creamy weathering on exterior; creamy iridescent weathering covering interior; some weathering on jagged edges.. Glass mosaic ribbed bowl fragment. Roman. late 1st century B.C.-early 1st century A.D.. Glass; cast and tooled. Early Imperial. Glass